- Muon Space raises $250 million, led by Eclipse Capital, at a $1.5 billion valuation.
- Its new San Jose plant targets 500 satellites a year by 2027, up from 11 to date.
- The round pulls Muon deeper into defence work, alongside NASA and NOAA contracts.
Muon Space, the Mountain View satellite maker, has closed a $250 million Series C led by Eclipse Capital. The round brings its total equity funding to more than $386 million.
Existing investors Radical Ventures, Congruent Ventures, Costanoa Ventures, Activate Capital, ACME Capital, ArcTern Ventures, and Overlap Holdings returned for the round.
“As more industries rely on space-based intelligence, communications, and compute, this investment allows us to accelerate the next generation of space infrastructure,” said Jonny Dyer, Muon’s co-founder and CEO.
New investors Galvanize, Google, Salesforce Ventures, Wellington Management, I Squared Capital, and Woven Capital joined the oversubscribed round.
Satellites have gone from science projects to strategic infrastructure, and money is following: the small satellite market is growing from $9.35 billion in 2025 to $32.13 billion by 2030, a 28% annual clip driven largely by commercial and defence constellations.
From 11 to 500 satellites a year
Founded in 2021 by Dyer, Paul Day, Dan McCleese, Reuben Rohrschneider, and Pascal Stang, the company started out building climate-monitoring satellites. Dyer previously ran engineering at Skybox Imaging, the smallsat pioneer Google bought for $500 million in 2014.
Tech Funding News covered Muon’s $56.7 million Series B in 2024 and its $146 million Series B1 in 2025, which funded propulsion integration and Muon’s first production line.
The startup works by bundling mission design, spacecraft, payloads, software, operations, and data delivery into one platform it calls the Mission Foundry, rather than selling individual buses or components. That puts it against Loft Orbital, which sells modular, standardised spacecraft to customers who’d rather not build their own, and Terran Orbital, now part of Lockheed Martin’s manufacturing arm. Muon’s argument is that neither competitor controls enough of the stack to hit true production-line economics.
On execution, its clearest proof point isFireSat, the wildfire-detection constellation built with Google and the Earth Fire Alliance, which put its first three operational satellites in July. Muon has also built larger satellites for Hubble Network’s Bluetooth-tracking constellation.
A potential IPO in the crowded market
Eclipse has backed similarly capital-heavy physical-industry bets before, including Cerebras, which went public in May at a valuation above $56 billion, and manufacturing automation firm Bright Machines.
“Muon is redefining how space infrastructure is built,” said Lior Susan, founder and CEO of Eclipse, adding that Muon had turned “what was once a bespoke, years-long process into a repeatable model built to scale.”
With the new capital, Muon plans to scale its 148,000-square-foot San Jose facility to 500 satellites per year by 202, while growing beyond its current headcount of 272.
Dyer has said he isn’t rushing toward a public listing despite IPO chatter as early as 2027. But a factory built for a scale none of Muon’s rivals can match only proves the theory once it’s actually running at full output, not before.
